Geballe, T. R., Kaminskiy, B. M., Banerjee, D. P. K., Evans, A., Pavlenko, Y., Rushton, Mark, Popescu, M. and Eyres, Stewart Paul shore (2025) Infrared Spectroscopy of V838 Monocerotis in 2015 and 2022. Monthly Notices of the Royal Astronomical Society . ISSN 0035-8711
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Official URL: https://doi.org/10.1093/mnras/staf1193
Abstract
We report medium-resolution m spectroscopy obtained in 2015 and 2022 and high resolution m and m spectroscopy obtained in 2015 of V838 Monocerotis, along with modeling of the spectrum. V838 Mon underwent a series of eruptions and extreme brightenings in 2002, which are thought to have occured as a result of a stellar merger. The new spectra and modelling of them reveal a disturbed red giant photosphere that is probably continuing to contract and ejecta that are cooling and continuing to disperse at velocities up to 200kms.
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